K3NbF7's electrochemical characteristics in the NaCl-KCl molten salt system at the Mo electrode
To explore the electrochemical behavior of Nb (IV) for form Nb metal, molten salt electrolysis was carried out in an NaCl-KCl melt containing K3NbF7 at 750 °C. It was discovered that Nb (IV) reduces in three stages: Nb(IV)➔Nb(III)➔Nb(II)➔Nb，and reduction process of Nb(IV)➔Nb(III) was irreversible pr...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Electrochemistry Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248125000827 |
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| Summary: | To explore the electrochemical behavior of Nb (IV) for form Nb metal, molten salt electrolysis was carried out in an NaCl-KCl melt containing K3NbF7 at 750 °C. It was discovered that Nb (IV) reduces in three stages: Nb(IV)➔Nb(III)➔Nb(II)➔Nb，and reduction process of Nb(IV)➔Nb(III) was irreversible process controlled by diffusion mechanism. The instantaneous nucleation of niobium on the molybdenum electrode is observed in the KCl-NaCl-K3NbF7 melt, which occurs at a potential of −3.06 V vs. Cl2/Cl− and a temperature of 750 °C, the niobium metal was deposited on Mo wire cathode by constant potential electrolysis, resulting in a high purity of 98.63 %. |
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| ISSN: | 1388-2481 |